Telegraph-transmitter.



mamas. '1" PATBNTEB MAY 14, 19a? r G. W. LEISEE.

'iELi-ERAPH TRANQMITTER.

uumumx TILE 23 11 1 5 1905.

animator CHARLES WliiSUN lililSlQli, (il SALT LAKE CITY, ll All.

TELEGRAPH-TRANSMITTER.

Specification of Letters Patent.

Patented May 14, 1907.

lipniicaticn filed February 15, 1905 Serial No. 301,185.

In no mimnt if Hi/(LL! (to/morn:

Bo it known that LC] nouns Wilson linisnn,

u citizcn of thc Unitcd Slatcs,rcsidi11g at Salt 5 wcight c, and so placed that when lovcr C is Statc oi Utah, havc invontcd now and usciul .liakc City, in thc county oi Salt llakc and lmprovcmonts in 'lclcgraph lransinittcrs, of which the following is a spcciiicaiion.

As tclcgraph transmitters arc now constructed, they are unahlc to transmit Morse signals over long distancc telegraph circuits, bccausc thc lcvcr which makes tho (lots to be transmitted is opposcd by a system of contacts which stops the lover in its forward movement thcrcby causing it to rcccde more quickly than ii thcsc causes wcrc removed. This premature stoppagc produccs a short,

nick contact, which will not carrv on a long istancc circuit. My invention reinovcs this difficulty. Again, on all dircct contact points an oxid forms, which prevents an cloctric contact until the points arc clcanod.

in this improvement the contacts arc clfcctcd by a sliding, movement in which the points or surfaccs of contact overlap, and so overcome tho dil'licultics abovc mentioned. That it prevents the formation of oxid on the contacts, andinsnrcs cithcr a long or short contact as required to most the conditions of long and short circuits.

As anothor icaturc of my transmitter I cm ploy a llcxiblc armature lover, which costs less hccauso it has fewer parts than the ordinary form. There are no hearings to wcar out the adjustment cannot change after i.-c ing set and it is capable of the grcatcst speed.

The accompanying drawing iliustratcsthc invention, its various parts being referred to by letters, similar letters denoting corresponding p arts in the several views.

Figure 1 is a side elevation of the device, partly in section. Fig. 2 is a plan view and showing the connections. Fig. 3 is a modification of the sliding contact surfaces; and Fig. 4 is an elevation of the post E partly hrokcn away on line m-:1c-of Fig. 1.

The letter A design atcs an elcctro-magnct mounted in the. usual Way.

B is a stationary post, and C is a flexible armature lcvcr, rigidly, but adjustalrlv hold in the post B. It passes through an opening a in the magnet support A. This lever is formed of the part 0, hold in the post B, a flat spring portion c and an outer portion 0 which oscillates laterally as shown by dotted li'ncs.

D is the armature piece on lever C, which i the othcr parts of the machine.

also currics a Weight and a spring contact piccc (i.

l is a pcrmancnt post carrying a loosc a1 rust, it prcsscs slightly against the weight c, whosc illl'litifll'] is to prcvcnt vilration oi lcvcr whcn rolcascd by magnct A.

f and g arc operating keys provided with rctractilc springs f, g.

ll is a battery.

Tho parts I and i constitutc a circuit break contact; 1 hcing fastened to lever C, and i icing adjustabl attached to post J. Koyf i1 laptod to contact with point r, and key g with point in.

K is a post, holding an adjustable bar 11, to which conncctcd, flexiblygthc convex contact O; and m is a corresponding flexible, oonvcX contact secured to oscillating lcvcr C. T hcsc two convex tacos have a mutual, sliding', or lapping contact.

a, a are binding posts loading to thc tclcgraphic circuit to he worked.

In operating this transmitter when keyf is made to contact with point 1), a circuit is cstahlishcd through wire 3, battery H, wire 4, magnets A, wire 2, circuit break contacts I, 'iand Wire 1 back to point '0. This causes tho ma mots to attract the armature D and moves lorward the lever C. This contact laccs Q and m, which shunts binding posts a, a through the parts Q, L, O, m. This shunting a, n, would cause the teic raph circuit to be closed; and owing to the circuit break contacts at I, i, the contact of O and m would he only momentary; the circuit break contacts giving an oscillating movement to the lover C, which would cause a series of opening and closing movements at O, or so long as key f is kept closed, and so transmitting dots to the telegraph circuit at n, n.

Vi hcn key 9 is mado to contact with w a circuit is established through parts 5, 6, Q, Q to posts a, n, ncccssarib closing the circuit connected with n, n: and there being no circuit break in this circuit, the circuit will remain closed so long as key 9 is in contact with point By the proper period of time in this contact, dashes are sent to the telegraph circuit to be worked. It should be noticed that the dashes are transmitted through the parts mentioned irrespective of In other machines the dashes as Well as the dots are made by a lever actuated by inaqncts.

In my double key system, when dots follow a dash, press both keys the proper length of time for the dash, then release the dash side and the dots will follow. If a dash follow a series of dots, gently close the dash side and the dash will follow closely on the dots. All this 1s done without the usual wabble of the whole hand.

What I claim and desire to secure is- 1. The combination with an electric battery of a flexible lever, an armature on said lever, sliding spring contacts, electro-magnets to operate said lever, a vibration arrester comprising a support having a vertical recess therein, a cross pin in said recess and a ring hung loosely on said pin, a circuit break, a pair of operating keys and suitable connections between the parts, as herein set forth.

2. In a telegraph transmitter having an electric battery, a flexible lever operated by electro-magnets, an armature on said lever and sliding spring contacts, a vibration arrester formed of a support having a vertical recess, a cross pin in said recess and a ring loosely hung on said cross pin, a circuit break, a pair of operatii'ig keys and suitable connections as herein described.

3. The herein described vibration arrcstei comprising a support having a vertical recess in its upper end, a cross pin in said rceess and a ring suspended loosely on said pin and adapted to receive the impact of the vibrating object.

"1. In an electric machine a post having a recess in its upper end, a ring having an inner elastic surface, a cross pin in said recess on which said ring is movably supported so as to yieldingly receive the impact of a vibrating lever, as herein set forth.

In testimony whereof I aHiX my signature, in presence of two subscribing witnesses.

CHARLES W'ILSON LEISER.

Witnesses A. E. ANAKIN, W. BINEY. 

